BUCHI Distillation Unit K-355 - Manual (Page 22)

6 Operation
22 K-350 Operation Manual, Version F
6 Operation
This chapter gives examples of typical instrument applications and instructions on how to operate the
instrument properly and safely.
WARNING
Risk of injury.
Never operate the instrument when glassware is damaged.
WARNING
Sodium hydroxide, acid and lye are used for applications according to Kjeldahl. For this reason,
protective goggles must be worn at all times when using this instrument or working in its immediate
proximity.
NOTE
Close unused connections with plug caps.
6 .1 Addition of chemicals
6 .1 .1 Manual dosage
When pressing “REAGENT” the connected reagent is dosed as long as the switch is pressed.
6 .1 .2 Automatic dosage
The reagent volume dosed before the distillation is started is stored. This volume can be recalled after
distillation.
The stored volume is dosed by pressing “REAGENT” shortly. After releasing the switch, the volume is
dosed automatically.
6 .1 .3 General information
The reagent switch is also active when the instrument is “Ready” or “Busy” (during distillation), so that
additional dosage of reagent is possible during distillation.
During preheating, reagent addition is not possible.
The reagent volume stored before the start of the distillation is defined as the pump operating time.
The stored pump operating time (reagent volume) can be recalled after the distillation or after pressing
“STOP”.
If “STOP” is pressed during the automatic addition of reagent, the default volume is set to 0 ml.
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